Sir William Ian Ridley Johnston CBE QPM DL was the Chief Constable of British Transport Police. He became Chief Constable on 1 May 2001 when he succeeded David Williams QPM, who had served as Chief Constable for three and a half years.
يان جونستون (بالإنجليزية: Sir William Ian Ridley Johnston) هو ضابط شرطة بريطاني، ولد في 1945. (ar)
Sir William Ian Ridley Johnston CBE QPM DL was the Chief Constable of British Transport Police. He became Chief Constable on 1 May 2001 when he succeeded David Williams QPM, who had served as Chief Constable for three and a half years. (en)